What do you really need? The two routers you named are based on very similar (and pretty powerful) hardware, a Broadcom 47xx LAN controller and a Broadcom 600 MHz CPU. In terms of using a Linux-based router-OS (DD-WRT, OpenWRT, etc.), the Asus is much more prone to bricking, whereas the Linksys uses small internal antennae, thus having inferior range/penetration. Is dual-band wireless essential to you? Are USB ports for storage/print sharing truly necessary? Do you plan on using complicated QoS or SPI Firewalling rules? HTTP/Keywords filtering? If not, perhaps you don't need that much CPU power.
How big is the area you'd like to cover with wi-fi signal? Do you have any special, actual needs, such as DLNA streaming, USB sharing and the like? Are there any thick walls for the signal to go through? How many concurrent clients do you expect? Do you need high speed for HD streaming?
Perhaps a nice AP/WRouter such as the TP-Link TL-WR843ND would do the trick, and not require robbing a bank...
Careful what you wish for... You just might get it.